The Cambridge natural history, Vol. 03 (of 10)Note 99 — Chapter II · LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMYReading editionQuoted by Oehlert, Rév. Sc. xxxviii. p. 701.◇Copy noteReturn to CHAPTER II LAND AND FRESH-WATER MOLLUSCA, THEIR HABITS AND GENERAL ECONOMY